List Of Illustrations - Tektronix 2246 1Y Service Manual

2246 1Y and 2246 Mod A Service
Figure
The 2246 1Y and Mod A
Portable Oscilloscope .................................. x
1-1 Maximum input voltage vs frequency
derating curve for the CH 1, CH 2,
CH 3, or CH 4 input connectors . . . . 1-14
1-2 Dimensional outline drawing,
standard cabinet .................................... 1-20
1 - 3 Dimensional outline drawing,
rackmount c a b in e t.................................. 1-21
2 - 1 Optional power cords ...............................2-1
3 - 1 Display Sequencer 1C (SLIC, U600)
pin-out d ia g ra m .................................... 3-16
3-2 Readout interface relative
signal tim in g .............................................3-25
3-3 Trigger Logic 1C (FLIC, U602)
pin-out d ia g ra m ...................................... 3-26
3-4 Simplified Sweep Circuit ........................ 3-32
3-5 A Sweep Start circuit waveforms . . . . 3-36
3-6 Simplified diagram of the DC
Restorer circuitry .................................... 3-40
3-7 Display addresses ................................... 3-48
3-8 Character pixel arrangement ................3-50
3-9 Power Supply block diagram
3-10 Preregulator switching waveforms . . . 3-56
5-1 Areas of waveform affected by
HF co m p e n sa tio n .................................... 5-10
5 - 2 2-5 ns T im in g ............................................5-13
6 - 1 Power-on test failure c o d e s ..................6-10
6-2 Initial SERVICE MENU...............................6-11
vi

LIST OF ILLUSTRATIONS

................3-54
6-3 SERVICE MENU with DIAGNOSE
choice selected ..................................
6-4 Main board re m o v a l............................
6-5 Delay-line connections to top of
Main board ...........................................
9-1 Color codes for resistors
9-2 Semiconductor lead configurations
9-3 Locating components on schematic
diagrams and circuit board illustrations
9 -4 Simplified 2246 1Y and 2246 Mod A
block diagram
9-5a Detailed 2246 1Y or 2246 Mod A block
diagram-part 1
9-5b Detailed 2246 1Y or 2246 Mod A block
diagram-part 2
9-6a A10-Main board for SN B715000 and
above (2246 1Y), and B120000 and above
(2246 Mod A)
9-6b A10-Main board for SN B710100 to
B714999 (2246 1Y), and SN B110100 to
B119999 (2246 Mod A)
9 -6 c A10-Main board for SN B710099 and
below (2246 1Y), and B110099 and below
(2246 Mod A)
9 -7 A9-2 mV Bandwidth board for SN B700100
to B714999 (2246 1Y), and SN B100100
to B119999 (2246 Mod A)
9-8 Hybrid pin identifiers
9-9 A8-CRT Control board
9-10 A16-Processor board
9-11 A14-Switch board
9-12 A12-Potentiometer board
9-13 A18-Power Supply board
9-14 A10-Main board adjustment locations
Page
6-12
6-44
6-45
REV OCT 1991